Square battery internal resistance testing device

Abstract

The utility model relates to the technical field of battery internal resistance testing, in particular to a square battery internal resistance testing device, which comprises a base, a testing probe and an electromagnet, and is characterized in that the base is used for clamping a square battery; a supporting assembly is arranged at the top of the base, two translation assemblies capable of horizontally moving are arranged at the top of the supporting assembly, and the test probes and the electromagnets are arranged on the two translation assemblies; the electromagnet is magnetically connected with the supporting assembly; according to the square battery internal resistance testing device provided by the utility model, the position of the testing probe is adjustable, so that the testing probe can be conveniently aligned with the positive electrode and the negative electrode of the battery, and the square battery internal resistance testing device can be compatible with square batteries of various specifications; the problem that an existing square battery internal resistance testing device cannot align to positive electrodes and negative electrodes of square batteries of different specifications, so that the adaptability of the testing device is poor is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery internal resistance test technical field especially relates to a square battery internal resistance testing device. BACKGROUND

[0002] Battery internal resistance is a key parameter that influences battery performance. Internal resistance size is directly related to voltage drop, heating condition and energy conversion efficiency of battery in the discharging process. For electric vehicle, energy storage system and other application fields, accurate measurement and monitoring battery internal resistance have important significance for ensuring the safe operation of system, prolonging battery life, optimizing charging strategy and the like.

[0003] The internal resistance testing device is a device for testing the internal resistance of a square battery. For example, the square battery internal resistance testing device provided in application No. 201921795762. X includes a horizontally distributed bottom plate; a horizontally distributed intermediate supporting plate is fixedly installed in the middle of the top surface of the bottom plate; one test probe is installed at the left and right ends of the intermediate supporting plate respectively; and the two test probes are arranged corresponding to the positive and negative poles of the square battery.

[0004] As the above technical solution, the two test probes on the existing square battery internal resistance testing device are fixed in position. During actual testing, the positive and negative poles of different specifications of square batteries cannot be aligned, resulting in poor adaptability of the testing device. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides a square battery internal resistance testing device. The position of the test probe is adjustable, which facilitates the alignment of the test probe and the positive and negative poles of the battery. The device can be compatible with square batteries of various specifications, and solves the problem of poor adaptability of the testing device due to the inability of the existing square battery internal resistance testing device to align the positive and negative poles of square batteries of different specifications.

[0006] The technical solution of the utility model is as follows:

[0007] The utility model provides a square battery internal resistance testing device, which comprises a base, a test probe and an electromagnet, wherein,

[0008] The base is used for clamping a square battery;

[0009] The top of the base is provided with a supporting assembly, the top of the supporting assembly is provided with two horizontally movable translation assemblies, and the test probe and the electromagnet are arranged on the two translation assemblies;

[0010] The electromagnet is magnetically connected with the supporting assembly.

[0011] On the basis of the above technical scheme, preferably, the support assembly comprises a fixing frame and a test frame, wherein,

[0012] The fixing frame is fixed on the base;

[0013] The test frame is arranged on the inner side of the fixing frame in a lifting manner;

[0014] Two translation path holes are arranged on the test frame in a vertical manner, and one translation assembly is arranged in each translation path hole;

[0015] The hole wall of the translation path hole is magnetically connected with the electromagnet.

[0016] On the basis of the above technical scheme, preferably, the support assembly further comprises an electric sliding rail and a sliding table, wherein,

[0017] Both sides of the fixing frame are provided with lifting path grooves, and the groove openings of the two lifting path grooves are opposite to each other, and one electric sliding rail is fixed in each lifting path groove;

[0018] Both ends of the test frame are fixed with one sliding table, one of the sliding tables is fixedly connected with the output end of one of the electric sliding rails, and the other sliding table is fixedly connected with the output end of the other electric sliding rail.

[0019] On the basis of the above technical scheme, preferably, the translation assembly comprises an adjusting seat, a driving shaft, a driving wheel and a driving motor, wherein,

[0020] The adjusting seat is slidingly arranged in the translation path hole, and the test probe penetrates the adjusting seat in a vertical manner and is fixedly connected with the adjusting seat;

[0021] The side of the adjusting seat is provided with a plurality of driving wheels and a plurality of electromagnets, and the driving wheels are rollingly connected with the hole wall of the translation path hole;

[0022] One driving shaft is fixed on each driving wheel, and one driving motor is connected on each driving shaft;

[0023] The driving shaft penetrates the adjusting seat in a vertical manner and is rotationally connected with the adjusting seat;

[0024] The driving motor is fixed on the top of the adjusting seat, and the output end of the driving motor is fixedly connected with the driving shaft.

[0025] On the basis of the above technical scheme, preferably, further comprising an upper distance measuring sensor, wherein,

[0026] One upper distance measuring sensor is fixed on the side of each adjusting seat, and the two upper distance measuring sensors are arranged oppositely.

[0027] Preferably, the lower distance sensor is vertically arranged, and the lower distance sensor is fixed to the bottom of the test frame.

[0028] Preferably, the lower distance sensor is vertically arranged, and the lower distance sensor is fixed to the bottom of the test frame.

[0029] Preferably, the top of the base is provided with a placing groove, wherein,

[0030] The inner side of the placing groove is provided with a battery clamping assembly.

[0031] Preferably, the battery clamping assembly comprises a clamping plate, a T-shaped push rod, a fixing sleeve and a reset spring, wherein,

[0032] Four clamping plates are arranged in the matrix on the inner side of the placing groove, and four clamping plates are respectively used to clamp four sides of a square battery.

[0033] At least one T-shaped push rod is fixed to the side of each clamping plate, and a fixing sleeve is sleeved on the outside of each T-shaped push rod.

[0034] The fixing sleeve is inlaid on the side wall of the placing groove.

[0035] The fixing sleeve and the T-shaped push rod are in sliding seal, forming a cylinder structure.

[0036] Each groove wall of the placing groove is provided with a counterbore, and a reset spring is clearance-fitted in each counterbore.

[0037] One end of the reset spring is fixedly connected to the side end of the clamping plate.

[0038] Preferably, the battery clamping assembly further comprises a flow guide pipe, an annular pipe and a micro air pump, wherein,

[0039] The flow guide pipe, the annular pipe and the micro air pump are respectively fixed in the base.

[0040] Each fixing sleeve is communicated with a flow guide pipe, and the flow guide pipe is communicated with the annular pipe.

[0041] The annular pipe is communicated with the air outlet of the micro air pump.

[0042] The base is provided with an air inlet channel, and the micro air pump is arranged in the air inlet channel.

[0043] Preferably, the annular pipe is arranged directly below the placing groove.

[0044] The square battery internal resistance testing device has the following beneficial effects relative to the prior art:

[0045] (1) By setting two horizontally movable translation components, the spacing of the two test probes is adjustable, so that the test probes can be aligned with the positive and negative electrodes of different specifications of batteries, and the device can be compatible with square batteries of multiple specifications.

[0046] (2) By setting the electromagnet and the support component in magnetic connection, the spacing of the two test probes is fixed, and the stability of the test is improved.

[0047] (3) By setting the test frame liftable on the inner side of the fixed frame, the use height of the test probe is adjusted, and the compatibility of the device is better.

[0048] (4) By setting the placing groove, and the battery clamping component for clamping the square battery is arranged on the inner side of the placing groove, the square battery is fixed, and the test stability is better. BRIEF DESCRIPTION OF DRAWINGS

[0049] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0050] Figure 1 It is a perspective view of a square battery internal resistance testing device of the present application;

[0051] Figure 2 It is a front view of a square battery internal resistance testing device of the present application;

[0052] Figure 3 It is a partial top view sectional view of a square battery internal resistance testing device of the present application;

[0053] Figure 4 It is an enlarged view of point A of Figure 2

[0054] ​In the figure: 1, base; 2, fixed frame; 3, test frame; 4, electric sliding rail; 5, sliding table; 6, adjusting seat; 7, test probe; 8, drive shaft; 9, drive wheel; 10, electromagnet; 11, drive motor; 12, upper distance sensor; 13, lower distance sensor; 14, placing groove; 15, clamping plate; 16, T-shaped push rod; 17, fixed sleeve; 18, flow guide pipe; 19, annular pipe; 20, micro air pump; 21, return spring; 22, controller; 23, power plug; 101, air inlet channel; 201, lifting path groove; 301, translation path hole; 1401, counterbore. DETAILED DESCRIPTION

[0055] The technical solutions in the utility model will be clearly and completely described below in combination with specific implementation manners of the utility model. Obviously, the described implementation manners are only part of the implementation manners of the utility model, rather than all the implementation manners. Based on the implementation manners in the utility model, all other implementation manners obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0056] As shown in the figure, the utility model discloses a square battery internal resistance testing device, which comprises a base 1, test probes 7 and electromagnets 10. Figures 1-4

[0057] Among them, the base 1 is used for clamping the square battery to improve the stability of testing.

[0058] The top of the base 1 is provided with a supporting assembly, the top of the supporting assembly is provided with two horizontal movable translation assemblies, and the two translation assemblies are both provided with test probes 7 and electromagnets 10. Through the structure, the spacing of the two test probes 7 can be adjusted to facilitate the alignment of the test probes 7 and the positive and negative poles of the battery, so that the device can be compatible with square batteries of various specifications.

[0059] The electromagnets 10 are magnetically connected with the supporting assembly and are used for fixing the position of the translation assembly after movement, so as to fix the spacing of the two test probes 7 and make the test probes 7 always positively contact the electrodes of the battery.

[0060] In the above-mentioned square battery internal resistance testing device, the supporting assembly comprises a fixed frame 2 and a test frame 3, wherein the fixed frame 2 is fixed on the base 1; the test frame 3 is movably arranged on the inner side of the fixed frame 2; two translation path holes 301 are vertically arranged on the test frame 3, and one translation assembly is arranged in each translation path hole 301; the hole wall of the translation path hole 301 is magnetically connected with the electromagnet 10. In the structure, the test frame 3 is movable to facilitate the adjustment of the use height of the test probes 7, so that the compatibility of the device is better.

[0061] ​The support assembly is provided with lifting path grooves 201 on both sides of the fixing frame 2, the grooves of the two lifting path grooves 201 are opposite to each other, and one electric sliding rail 4 is fixed in each lifting path groove 201; one sliding table 5 is fixed at each end of the test frame 3, one of the sliding tables 5 is fixedly connected to the output end of one of the electric sliding rails 4, and the other sliding table 5 is fixedly connected to the output end of the other electric sliding rail 4. When the use height of the test probe 7 needs to be adjusted, the test frame 3 is driven to rise and fall by the electric sliding rail 4, so as to adjust the height of the test probe 7.

[0062] In order to improve the height adjustment accuracy, a lower distance measuring sensor 13 is fixed vertically at the bottom of the test frame 3, and the lifting distance of the test frame 3 is measured by the lower distance measuring sensor 13.

[0063] In the above-mentioned square battery internal resistance testing device, the translation assembly includes an adjusting seat 6, a driving shaft 8, a driving wheel 9 and a driving motor 11, wherein the adjusting seat 6 is slidingly arranged in the translation path hole 301, the test probe 7 penetrates the adjusting seat 6 vertically and is fixedly connected with the adjusting seat 6; a plurality of driving wheels 9 and a plurality of electromagnets 10 are uniformly distributed on the side of the adjusting seat 6 in the circumferential direction, the driving wheel 9 is rollingly connected with the hole wall of the translation path hole 301; one driving shaft 8 is fixed on each driving wheel 9, and one driving motor 11 is connected to each driving shaft 8; the driving shaft 8 penetrates the adjusting seat 6 vertically and is rotationally connected with the adjusting seat 6; the driving motor 11 is fixed on the top of the adjusting seat 6, and the output end of the driving motor 11 is fixedly connected with the driving shaft 8.

[0064] When the position of the test probe 7 needs to be adjusted, the adjusting seat 6 is driven to translate by the driving motor 11, the adjusting seat 6 carries the test probe 7 to change the position, and the position adjustment is realized.

[0065] In order to improve the translation accuracy, an upper distance measuring sensor 12 is fixed on the side of each adjusting seat 6, the two upper distance measuring sensors 12 are oppositely arranged, and the translation distance of the adjusting seat 6 is measured by the upper distance measuring sensor 12.

[0066] In the above-mentioned square battery internal resistance testing device, the top of the base 1 is provided with a placing groove 14, and the inner side of the placing groove 14 is provided with a battery clamping assembly for clamping the square battery. The battery to be tested is fixed by clamping, and the stability of the test is improved.

[0067] In the structure, the battery clamping assembly comprises clamping plates 15, T-shaped push rods 16, fixed sleeves 17 and return springs 21, wherein the four clamping plates 15 are arranged on the inner side of the placing groove 14 in a matrix, and the four clamping plates 15 are used for clamping the four sides of the square battery respectively; at least one T-shaped push rod 16 is fixed to the side of each clamping plate 15, and one fixed sleeve 17 is sleeved on the outside of each T-shaped push rod 16; the fixed sleeve 17 is embedded in the side wall of the placing groove 14; the fixed sleeve 17 and the T-shaped push rod 16 are in sliding sealing, and form a cylinder structure; a counterbore 1401 is arranged on each groove wall of the placing groove 14, and a return spring 21 is in clearance fit in the counterbore 1401; one end of the return spring 21 is fixedly connected to the side end of the clamping plate 15. The clamping plate 15 is driven to translate by the cylinder structure, the battery to be tested is clamped, and after the test is completed, the clamping plate 15 is driven to reset by the return spring 21.

[0068] In order to conveniently supply air to the cylinder structure, the battery clamping assembly further comprises a flow guide pipe 18, an annular pipe 19 and a micro air pump 20, wherein the flow guide pipe 18, the annular pipe 19 and the micro air pump 20 are fixed in the base 1 respectively; one flow guide pipe 18 is communicated with each fixed sleeve 17, the flow guide pipe 18 is communicated with the annular pipe 19, and the annular pipe 19 is arranged directly below the placing groove 14; the annular pipe 19 is communicated with the air outlet of the micro air pump 20; an air inlet channel 101 is arranged on the base 1, and the micro air pump 20 is arranged in the air inlet channel 101. Compressed air is output by the micro air pump 20 to supply air to the cylinder structure.

[0069] In addition, a controller 22 is mounted on the front of the base 1, a power plug 23 is fixedly connected to the inside of the base 1 and close to the controller 22, and the electric sliding rail 4, the driving motor 11, the electromagnet 10, the upper distance sensor 12, the lower distance sensor 13, the micro air pump 20 and the power plug 23 are electrically connected to the controller 22.

[0070] The controller 22 is used as a core control unit of the entire square battery internal resistance testing device, and is responsible for coordinating and managing the work of various components. Therefore, the controller 22 needs to have at least the following hardware components: a central processing unit, which is responsible for executing a control program, processing sensor data, sending control instructions and the like; an input / output interface (I / O interface), which is used for connecting and controlling the above-mentioned electric devices; a driving circuit, which is used for driving the above-mentioned electric devices to perform corresponding actions; a memory, which is used for storing program codes, configuration parameters and test data; and a man-machine interface, which is used for man-machine interaction, displays state information and operation prompts.

[0071] The use method of the square battery internal resistance testing device is as follows:

[0072] Firstly, the square battery is placed into the placing groove 14, the controller 22 starts the micro air pump 20, the micro air pump 20 sends air into the fixed sleeve 17 through the annular pipe 19 and the flow guide pipe 18, the air in the fixed sleeve 17 pushes the clamping plate 15 to move inwards through the T-shaped push rod 16, the clamping plate 15 moving inwards will abut against the square battery, so that the square battery is fixed in the placing groove 14 in the base 1.

[0073] The distance between the positive and negative poles of the square battery is input into the controller 22, the controller 22 starts the driving motor 11, the driving motor 11 drives the driving wheel 9 to rotate through the driving shaft 8, the rotating driving wheel 9 rolls on the inner wall of the test frame 3 by friction, the rolling driving wheel 9 drives the adjusting seat 6 to move towards the center in the test frame 3, the upper distance measuring sensor 12 detects the distance between the two groups of adjusting seats 6, when the distance between the two groups of adjusting seats 6 is matched with the distance between the positive and negative poles of the square battery, the controller 22 closes the driving motor 11, the driving motor 11 no longer drives the driving shaft 8 and the driving wheel 9 to rotate, the adjusting seat 6 stops moving, the controller 22 starts the electromagnet 10, the electromagnet 10 will attract the test frame 3, and the adjusting seat 6 is fixed in the test frame 3.

[0074] The controller 22 starts the electric sliding rail 4, the electric sliding rail 4 drives the test frame 3 and the adjusting seat 6 to move downwards through the sliding table 5, the lower distance measuring sensor 13 measures the distance between the test frame 3 and the square battery, when the distance measured by the lower distance measuring sensor 13 reaches the specified threshold value, the test probe 7 in the surface adjusting seat 6 is in close contact with the positive and negative poles of the square battery, the controller 22 closes the electric sliding rail 4, the electric sliding rail 4 no longer drives the test frame 3 and the adjusting seat 6 to descend, the test probe 7 is connected with a measuring instrument through a wire, and the measuring instrument measures the internal resistance of the square battery through the test probe 7.

[0075] After the test is completed, the electric sliding rail 4 drives the test frame 3 and the adjusting seat 6 to move upwards through the sliding table 5, the rising test frame 3 and the adjusting seat 6 drive the test probe 7 to fall off the positive and negative poles of the square battery, meanwhile, the micro air pump 20 extracts air from the fixed sleeve 17 through the annular pipe 19 and the flow guide pipe 18, the reset spring 21 pulls the clamping plate 15 and the T-shaped push rod 16 to move reversely, the reversely moving clamping plate 15 is separated from the square battery, the clamping plate 15 no longer clamps the square battery, and the square battery is taken out from the base 1.

[0076] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A square battery internal resistance testing device comprising a base (1), characterized in that: It also includes test probe (7) and electromagnet (10), wherein, The base (1) is provided with a clamping square battery; The top of the base (1) is provided with a support assembly, the top of the support assembly is provided with two horizontally movable translation assemblies, two translation assemblies are provided with test probe (7) and electromagnet (10); The electromagnet (10) is magnetically connected with the support assembly.

2. A square battery internal resistance testing device as claimed in claim 1, characterized in that: The support assembly comprises a fixed frame (2) and a test frame (3), wherein, The fixed frame (2) is fixed on the base (1); The test frame (3) is vertically arranged on the inner side of the fixed frame (2); The test frame (3) is provided with two translation path holes (301) vertically through each of which a translation assembly is arranged; The hole wall of the translation path hole (301) is magnetically connected with the electromagnet (10).

3. A square battery internal resistance testing device as claimed in claim 2, characterized in that: The support assembly further comprises an electric sliding rail (4) and a sliding table (5), wherein, The fixed frame (2) is provided with a lifting path groove (201) on both sides, the grooves of the two lifting path grooves (201) are opposite, and one electric sliding rail (4) is fixed in each lifting path groove (201); Both ends of the test frame (3) are fixed with one sliding table (5), one of which is fixedly connected with the output end of one of the electric sliding rails (4), and the other is fixedly connected with the output end of the other electric sliding rail (4).

4. A square battery internal resistance testing device as claimed in claim 3, characterized in that: The translation assembly comprises an adjusting seat (6), a drive shaft (8), a drive wheel (9) and a drive motor (11), wherein, The adjusting seat (6) is slidably arranged in the translation path hole (301), and the test probe (7) vertically penetrates the adjusting seat (6) and is fixedly connected with the adjusting seat (6); The side of the adjusting seat (6) is provided with a plurality of drive wheels (9) and a plurality of electromagnets (10), and the drive wheels (9) are rollingly connected with the hole wall of the translation path hole (301); One drive shaft (8) is fixed on each drive wheel (9), and one drive motor (11) is connected to each drive shaft (8); The drive shaft (8) vertically penetrates the adjusting seat (6) and is rotatably connected with the adjusting seat (6); The drive motor (11) is fixed on the top of the adjusting seat (6), and the output end of the drive motor (11) is fixedly connected with the drive shaft (8).

5. A square battery internal resistance testing device as claimed in claim 4, wherein: It also includes an upper distance measuring sensor (12), wherein, One upper distance measuring sensor (12) is fixed on the side of each adjusting seat (6), and two upper distance measuring sensors (12) are oppositely arranged.

6. A square battery internal resistance testing device as claimed in claim 2, characterized in that: It also includes a lower distance measuring sensor (13), wherein, The lower distance measuring sensor (13) is vertically arranged, and the lower distance measuring sensor (13) is fixed on the bottom of the test frame (3).

7. A square battery internal resistance testing device as claimed in claim 1 or 2, characterized in that: The top of the base (1) is provided with a placing groove (14), wherein, The inner side of the placing groove (14) is provided with a battery clamping assembly.

8. A square battery internal resistance testing device as claimed in claim 7, characterized in that: The battery clamping assembly comprises clamping plates (15), T-shaped push rods (16), fixing sleeves (17) and return springs (21), wherein, The clamping plates (15) are arranged in a matrix on the inner side of the placing grooves (14), and four clamping plates (15) are arranged for clamping four sides of a square battery respectively; At least one T-shaped push rod (16) is fixed to the side of each clamping plate (15), and a fixing sleeve (17) is sleeved on the outside of each T-shaped push rod (16); The fixing sleeve (17) is inlaid on the side wall of the placing groove (14); The fixing sleeve (17) and the T-shaped push rod (16) are in sliding seal, forming a cylinder structure; A counterbore (1401) is arranged on each groove wall of the placing groove (14), and a return spring (21) is fitted in each counterbore (1401) in a clearance fit; One end of the return spring (21) is fixedly connected to the side end of the clamping plate (15).

9. A square battery internal resistance testing device as claimed in claim 8, characterized in that: The battery clamping assembly further comprises a flow guide pipe (18), an annular pipe (19) and a micro air pump (20), wherein, The flow guide pipe (18), the annular pipe (19) and the micro air pump (20) are fixed in the base (1) respectively; One flow guide pipe (18) is communicated with each fixing sleeve (17), and the flow guide pipe (18) is communicated with the annular pipe (19); The annular pipe (19) is communicated with the air outlet of the micro air pump (20); An air inlet channel (101) is arranged on the base (1), and the micro air pump (20) is arranged in the air inlet channel (101).

10. A square battery internal resistance testing device as claimed in claim 9, wherein: The annular pipe (19) is arranged directly below the placing groove (14).

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